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https://github.com/hardikvasa/database-journal
Databases: Concepts, commands, codes, interview questions and more...
https://github.com/hardikvasa/database-journal
activemq aws code-sample database document-database dynamodb elasticsearch graph-database interview-questions kafka kinesis ledger mongodb mysql neo4j nosql-database postgresql redis-cache relational-database sqs-queue
Last synced: 10 days ago
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Databases: Concepts, commands, codes, interview questions and more...
- Host: GitHub
- URL: https://github.com/hardikvasa/database-journal
- Owner: hardikvasa
- License: mit
- Created: 2019-06-02T07:36:43.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2022-04-02T07:37:57.000Z (over 2 years ago)
- Last Synced: 2024-10-13T14:17:26.027Z (25 days ago)
- Topics: activemq, aws, code-sample, database, document-database, dynamodb, elasticsearch, graph-database, interview-questions, kafka, kinesis, ledger, mongodb, mysql, neo4j, nosql-database, postgresql, redis-cache, relational-database, sqs-queue
- Language: Python
- Homepage:
- Size: 326 KB
- Stars: 55
- Watchers: 4
- Forks: 20
- Open Issues: 1
-
Metadata Files:
- Readme: README.rst
- License: LICENSE
Awesome Lists containing this project
README
================
Database Journal
================
.. image:: images/types_of_dbs.png
:align: center
:width: 150pt
This repository is a collection of all-things database. It includes some fundamental concepts of databases, code samples, interview questions and more.
Index:
* `Database commands `__
* `Code Samples `__
* `Selecting the right database `__
* `Interview Questions `__
Database commands
=================
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+
| DBMS | Model | Description | Runtime | Link |
+===============+============+=======================================+=========+=====================================================================================================+
| MySQL | Relational | Mysql basic commands | Shell | `link `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+
| MongoDB | Document | MongoDB basic commands | Shell | `link `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+
Code Samples
============
This section contains sample codes for database operations. For python, there are several options like `mysql-connector`, `pymysql`, `MySQLdb`, `SqlAlchemy`, etc.
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| DBMS | Model | Description | Runtime | Sample Code | Docs |
+===============+============+=======================================+=========+=====================================================================================================+=========================================================================================================+
| MySQL | Relational | Python mysql connector code sample | Python | `link `__ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| MySQL | Relational | PyMySQL code sample | Python | `link `__ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| PostgreSQL | Relational | PostgreSQL using psycopg2 code sample | Python | `link `__ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| MongoDB | Document | MongoDB NoSQL database code sample | Python | `link `__ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| SQS | Queue | AWS Simple Queue Service operations | Python | `link `__ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| ActiveMQ | Queue | MQ Producer and MQ Consumer | Python | `link `_, `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| ActiveMQ | Queue | MQ Producer and MQ Consumer | Java | `link `_, `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| OracleDB | Relational | OracleDB sample code | Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| Kinesis | Stream | AWS Kinesis stream sample code. | Python | `link `_, `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| Redis | In-memory | Redis code sample in python. | Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| Neo4j | Graph | Graph database using neo4j-driver | Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| DynamoDB | Document | DynamoDB basic operations | Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| ElasticSearch | Search | ElasticSearch basic operations | Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| AWS Neptune | Graph | Connecting to AWS Neptune with Gremlin| Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| Cassandra | Wide-column| Cassandra basic operations | Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
| Amazon Aurora | MySQL | Basic Operations for Aurora DB | Python | `link `_ | `docs `__ |
+---------------+------------+---------------------------------------+---------+-----------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------+
DBMS comparison chart
=====================
This section some characteristics and comparison points between different database technologies.
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Property | Relational DB | NoSQL DB | Document DB | In-memory DB | Graph DB | Search DB | Time-series DB | Ledger DB | Queues | Streams |
+=================+====================+=====================+=====================+==================+===============+=================+====================+================+===================+===========================+
| Type | Relational | Non-Relational | Non-Relational | Non-Relational | Relational | Non-Relational | Relational | Non-Relational | Non-Relational | Non-Relational |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Data | Structured | Un-structured | Un-structured | Un-structured | Un-structured | Semi-structured | Structured | Chain | Un-structured | Un-structured |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Data format | Records, tuples | JSON | JSON | JSON | N/A | JSON | JSON | JSON | Objects | Objects |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Scalability | Vertical | Horizontal | Horizontal | Horizontal | Horizontal | Horizontal | Horizontal | Horizontal | Horizontal | Horizontal |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Record type | Flat | Hierarchical | Hierarchical | Hierarchical | Hierarchical | Hierarchical | Flat, Hierarchical | Hierarchical | Objects | Objects |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Applications | CRM, Finance | Shopping cart | Content Management | Leaderboards | Social media | Product catalog | IoT applications | Cryptocurrency | Queuing tasks | Weather data |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Complex queries | Yes | No | No | No | No | No | No | No | N/A | N/A |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Property | ACID | CAP theorem | CAP theorem | CAP theorem | CAP theorem | CAP theorem | ACID | N/A | N/A | N/A |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
| Engine(s) | MySQL, PostgresSQL | Cassandra, DynamoDB | MongoDB, DocumentDB | Redis, Memcached | Neo4j | Elasticsearch | InfluxDB | AWS QLDB | ActiveMQ, AWS SQS | Apache Kafka, AWS Kinesis |
+-----------------+--------------------+---------------------+---------------------+------------------+---------------+-----------------+--------------------+----------------+-------------------+---------------------------+
Contributing
============
Anyone is welcomed to contribute to this repository. If you would like to make a change, open a pull request.
For issues and discussion visit the `Issue Tracker `__. Additional articles and workshops can be found on `website `__.
Disclaimer
==========
The contents of this repository is merely for educational purpose. The content may not be accurate or up-to-date.